A) Spring wood
B) Autumn wood
C) Heart wood
D) Sap wood
Correct Answer: D
Solution :
The outer region of old tree stem consisting of recently formed xylem elements in sapwood or alburnum. This is of light colour and contains some living cells also in tlie association of vessels and fibres. - Central region of the old trees which was formed earlier is filled up with tannins, resins gums and other substances which make it hard and durable is called heart wood or duramen. - Each annual ring in the stem of dicot plant has two parts i.e., spring or early wood and autumn or late wood. Springwood is wider with larger, wider and light coloured xylem elements whereas autumn wood has smaller, narrow and darker xylem elements.
You need to login to perform this action.
You will be redirected in
3 sec
